n | a(n) |
---|---|
1 | 1 |
2 | 1 |
3 | 2 |
4 | 6 |
5 | 17 |
6 | 58 |
7 | 191 |
8 | 700 |
9 | 2515 |
10 | 9623 |
11 | 36552 |
12 | 143761 |
13 | 564443 |
14 | 2259905 |
15 | 9057278 |
16 | 36705846 |
17 | 149046429 |
18 | 609246350 |
19 | 2495727647 |
20 | 10267016450 |
21 | 42322763940 |
22 | 174974139365 |
[1,1,2,6,17,58,191,700,2515,9623,36552,143761, 564443,2259905,9057278,36705846,149046429, 609246350,2495727647,10267016450,42322763940, 174974139365] |